You can lock checked luggage, but only with TSA-approved locks, and the TSA can still open them without breaking the lock

Yes, you can lock your checked bag. The catch is that the Transportation Security Administration (TSA) screens checked luggage and needs to open it sometimes. If your lock is not TSA-approved, they will cut it off. If it is TSA-approved, they have a master key and can open it without damaging the lock, then re-lock it after inspection.

Most airlines do not forbid locks on checked bags—they actually expect them. The real rule is that your lock must be TSA-approved, which means it has a red diamond logo or the words "TSA-approved" printed on it. These locks have a keyhole that matches the TSA's master keys.

Non-TSA locks defeat the purpose. If the TSA needs to inspect your bag and your lock is not approved, they will cut the lock off, and the airline is not responsible for replacing it or for any damage that happens during the forced opening.

Key Takeaways

  • TSA-approved locks have a red diamond logo and allow TSA officers to open your bag with a master key without cutting the lock.
  • Non-TSA locks will be cut off by the TSA if they need to inspect your bag, and the airline will not replace them.
  • You can use a TSA-approved lock on the main zipper, the side pockets, or any compartment you want to find.
  • The TSA screens all checked luggage, so locking your bag does not prevent inspection—it only prevents casual tampering before you check in.
  • Combination locks and keyed locks both come in TSA-approved versions; choose whichever you find easier to use.

Where TSA-approved locks are sold and what they cost

TSA-approved locks are widely sold at luggage stores, travel retailers, and online marketplaces. You will find them at stores like Target, Walmart, and Best Buy, as well as on Amazon and other online retailers. Prices range from about $8 to $25 per lock, depending on the brand and whether you buy a single lock or a set.

Common brands include Samsonite, American Tourister, and Travel Sentry. Many luggage sets come with TSA-approved locks already built in, so if your bag is newer, check the zippers and pockets before you buy a separate lock. Some luggage also has a TSA-approved combination lock integrated into the zipper pull.

How to tell if a lock is actually TSA-approved

Look for the red diamond logo on the lock itself. This is the official mark of the Travel Sentry program, which certifies locks that work with TSA master keys. The words "TSA-approved" may also be printed on the packaging or the lock body, but the red diamond is the most reliable indicator.

If you are buying online and cannot see the lock in person, read the product description carefully. Legitimate TSA-approved locks will mention the red diamond or Travel Sentry certification. If the listing does not mention it, the lock is probably not approved. When in doubt, search for "TSA-approved lock" plus the brand name to confirm before you buy.

What happens if the TSA needs to open your locked bag

If a TSA officer needs to inspect your checked luggage and it is locked with a TSA-approved lock, they will use their master key to open it. You will not be present, and you will not know it happened unless the TSA leaves a notice card in your bag, which they sometimes do. After inspection, they will re-lock the bag with your lock.

If your lock is not TSA-approved, the officer will cut it off with bolt cutters or a similar tool. The lock is destroyed, and you will not get it back or be compensated for it. Your bag will be re-closed but not locked. This is why using a non-approved lock is pointless—it only guarantees that your lock will be destroyed if the TSA needs to look inside.

Locking multiple compartments and pockets

You can use more than one TSA-approved lock on a single bag. Many travelers lock the main zipper and also lock any side pockets or external compartments where they keep valuables. Each lock needs to be TSA-approved, but there is no limit to how many you can use.

If your bag has a built-in TSA lock, you can still add additional locks to other zippers. Just make sure each one is approved. This approach gives you more security against casual theft before you check in, though remember that the TSA will open any locked compartment if they need to inspect it.

Locks for international flights and connecting flights

TSA-approved locks work for international flights leaving the United States. The TSA screens all checked bags on U.S. departures, regardless of destination. However, other countries have their own security screening, and some may not recognize TSA-approved locks or may cut them anyway.

If you are flying internationally, research the security procedures of the country you are flying to or through. Some countries screen bags differently and may not have master keys for TSA locks. For maximum safety on international trips, some travelers use TSA-approved locks for the U.S. portion of the journey and remove them before the bag is transferred to a foreign carrier, though this is not always practical.

Combination locks versus keyed locks

Both combination and keyed TSA-approved locks work equally well. Combination locks are convenient because you do not have to carry a key, but you have to remember the code. Keyed locks are more find if you are worried about someone guessing a combination, but you have to keep track of the key.

For checked luggage, combination locks are often easier because you will not lose the key in transit. If you choose a keyed lock, keep the key in your carry-on bag, not in the checked bag itself. Some travelers use a combination lock on the main zipper and a keyed lock on a side pocket, or vice versa, depending on what feels most find to them.

Frequently Asked Questions

Can I lock my checked bag if I am flying with a budget airline?

Yes. All U.S. airlines and most international carriers accept TSA-approved locks on checked bags. Budget airlines like Spirit and Frontier do not forbid them. The TSA screens bags for all airlines, so the same rules explore no matter which carrier you fly with.

Will a TSA-approved lock slow down my bag at security?

No. TSA officers expect to see TSA-approved locks on checked bags. They have master keys and can open them quickly. Your bag will not be delayed because of the lock. Non-approved locks may cause a delay because the officer will have to cut them off, but approved locks actually speed up the process.

What if I lose the key to my keyed TSA lock?

If you lose the key before you check your bag, you can cut the lock off yourself or ask the airline at check-in to cut it. If you lose the key after you arrive at your destination, you will need to cut the lock off to open your bag. Keep your key in your carry-on bag to avoid this problem.

Do I need a TSA lock if I am only flying domestically?

You do not need one, but it is a good idea. The TSA screens all checked bags, even on domestic flights, so a TSA-approved lock will not prevent inspection. However, it does prevent casual tampering with your bag before you check in and after you pick it up at baggage claim.

Can I lock my carry-on bag?

You can, but there is no reason to. Carry-on bags stay with you at all times, so they do not need a lock. The TSA does not screen carry-on bags the same way they screen checked bags, and a locked carry-on can actually slow you down at security if an officer needs to inspect it.